Question

Which of the following is the incorrect statement?

• A. $He_{2}$ does not exist because its bond order is zero.
• B. $O_{2},O_{2}^{-}$ and $O_{2}^{+}$ are all paramagnetic.
• C. Any two atomic orbitals can combine to form two molecular orbitals.
• D. $\pi _{2 p_{x}}$ and $\pi _{2 p_{y}}$ are degenerate molecular orbitals.

Answer 1

Answer: (C)

Only those atomic orbitals combine, which nearly have, an equal amount of energy.